Description
Round-bottom flask 100 ml GL 25/12 is a single-neck laboratory flask designed for distillation, reaction and collection work in chemical and analytical laboratories. The vessel offers a nominal volume of 0,1 l (100 ml) and features one neck finished with a GL 25/12 thread connection, enabling secure coupling to compatible screw-thread accessories and apparatus. With a net weight of 0,057 kg, the flask provides a compact yet practical format for routine laboratory operations including heating, reflux and sample recovery. Manufactured by Witeg, this round-bottom flask belongs to the established families of ground-joint and distillation flasks used across research, quality-control and educational settings. Supplied as one piece, it supports flexible assembly of laboratory glassware trains where a 100 ml capacity and GL 25/12 interface are required. The single-neck geometry simplifies setup for standard procedures while the round-bottom profile promotes even heat distribution during thermal processes. Originating from Germany (Baden-Württemberg), the flask integrates into conventional laboratory glassware systems for reliable day-to-day use in synthesis, purification and collection applications.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: Round-bottom flask
- Nominal volume: 0,1 l (100 ml)
- Number of necks: 1
- Neck thread: GL 25/12
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Questions about Flask, round bottom, 100 ml, GL 25/12
What is this article?
Flask, round bottom, 100 ml, GL 25/12 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Round-bottom flasks, inside Beakers & flasks, in Labware.
A round-bottom flask is the heating flask of a distillation or a reflux. The curved wall takes the heat, and the ground neck connects to a still head or a condenser. The joint size, not only the volume, has to match the rest of the set.
A beaker is an open working vessel: easy to pour, poor as a measure. An Erlenmeyer flask has a flat base and a conical wall so a liquid can be swirled without climbing out. A round-bottom flask is for heating under a condenser, because the heat meets a curved wall and the joint at the neck connects to the rest of the glassware. Borosilicate is the glass that survives the temperature change. These forms are listed under ISO laboratory glassware.
Which category should I open next?
The category is Beakers & flasks. The sub-category is Round-bottom flasks. The catalogue is Labware.
Shelves beside this one are Beakers, Erlenmeyer flasks, Reaction vessels & jacketed vessels, Flat-bottom flasks, Flasks (other) and Beaker & flask accessories.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.

